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Financial Risk Management and Fair Values of Financial Instruments - Information on Assets and Liabilities Denominated in Foreign Currencies whose Values would be Materially Affected by Exchange Rate Fluctuations (Detail) ¥ in Thousands, ¥ in Thousands, $ in Thousands, $ in Thousands	Dec. 31, 2022 TWD ($) $ / ¥ $ / $ $ / ¥	Dec. 31, 2022 USD ($) $ / ¥ $ / $ $ / ¥	Dec. 31, 2022 JPY (¥) $ / ¥ $ / $ $ / ¥	Dec. 31, 2022 CNY (¥) $ / ¥ $ / $ $ / ¥	Dec. 31, 2021 TWD ($) $ / $ $ / ¥ $ / ¥	Dec. 31, 2021 USD ($) $ / $ $ / ¥ $ / ¥	Dec. 31, 2021 JPY (¥) $ / $ $ / ¥ $ / ¥	Dec. 31, 2021 CNY (¥) $ / $ $ / ¥ $ / ¥
Disclosure of detailed information about financial instruments [Line Items]
Assets denominated in foreign currencies | $	$ 15,034,220				$ 13,170,873
Exchange rate	30.73	30.73	30.73	30.73
Currency Risk [member] | US$ [member]
Disclosure of detailed information about financial instruments [Line Items]
Assets denominated in foreign currencies	$ 6,418,052	$ 208,989			5,207,798	$ 188,143
Liabilities denominated in foreign currencies	$ 338,762	$ 11,031			$ 1,468,203	$ 53,042
Currency Risk [member] | US$ [member] | Financial Liability [member]
Disclosure of detailed information about financial instruments [Line Items]
Exchange rate | $ / $	30.7100	30.7100	30.7100	30.7100	27.6800	27.6800	27.6800	27.6800
Currency Risk [member] | US$ [member] | Financial Asset [member]
Disclosure of detailed information about financial instruments [Line Items]
Exchange rate | $ / $	30.7100	30.7100	30.7100	30.7100	27.6800	27.6800	27.6800	27.6800
Currency Risk [member] | JPY [member]
Disclosure of detailed information about financial instruments [Line Items]
Assets denominated in foreign currencies	$ 26,712		¥ 114,940		$ 34,036		¥ 141,523
Liabilities denominated in foreign currencies	$ 368,989		¥ 1,587,732		$ 262,005		¥ 1,089,668
Currency Risk [member] | JPY [member] | Financial Liability [member]
Disclosure of detailed information about financial instruments [Line Items]
Exchange rate	0.2324	0.2324	0.2324	0.2324	0.2405	0.2405	0.2405	0.2405
Currency Risk [member] | JPY [member] | Financial Asset [member]
Disclosure of detailed information about financial instruments [Line Items]
Exchange rate	0.2324	0.2324	0.2324	0.2324	0.2405	0.2405	0.2405	0.2405
Currency Risk [member] | RMB [member]
Disclosure of detailed information about financial instruments [Line Items]
Assets denominated in foreign currencies	$ 31,733			¥ 7,199	$ 21,477			¥ 4,944
Currency Risk [member] | RMB [member] | Financial Asset [member]
Disclosure of detailed information about financial instruments [Line Items]
Exchange rate	4.4080	4.4080	4.4080	4.4080	4.3440	4.3440	4.3440	4.3440
Other Risks [Member] | JPY [member]
Disclosure of detailed information about financial instruments [Line Items]
Assets denominated in foreign currencies	$ 338,102		¥ 1,454,830		$ 384,521		¥ 1,598,839
Other Risks [Member] | JPY [member] | Financial Asset [member]
Disclosure of detailed information about financial instruments [Line Items]
Exchange rate	0.2324	0.2324	0.2324	0.2324	0.2405	0.2405	0.2405	0.2405
Other Risks [Member] | RMB [member]
Disclosure of detailed information about financial instruments [Line Items]
Assets denominated in foreign currencies	$ 4,086,378			¥ 927,037	$ 3,596,012			¥ 827,811
Other Risks [Member] | RMB [member] | Financial Asset [member]
Disclosure of detailed information about financial instruments [Line Items]
Exchange rate	4.4080	4.4080	4.4080	4.4080	4.3440	4.3440	4.3440	4.3440

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The spot exchange rate at the end of the reporting period. Exchange rate is the ratio of exchange for two currencies. Spot exchange rate is the exchange rate for immediate delivery.

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